Improved apparatus for desiccating substances



SMITH & HARRIS. 2 Sheets-Sheet 1;

Drying Apparatus. No. 98,808. Pa'tented Jan. 1 1?, 1870.f

l I l E l l N. P-EERS, PHOTO-LITHOGRAPHER, WASHXNQTON. D C.

lSMITH & HARRIS.

Drying Apparatus.

Patented Jan. 11, 187()n N. PETERS, PHOTMTKOGRIFHER, WAGEXNGTOIL D G.

teniet sans @stent @wird PEAIJAMIN'E. SMITH AND Leners rama No. 98,808, dazed January 11,1870.

nvrPRovnD APPARATUS PoR DESICCATING s'UBsTANcEs.

The Schedule referred to-in these Letters Patent and making part of the same.

Nature and Olpects of the Intention.

The drying or separating-chamber of our improved apparatus consists of a horizontal or nearly horizontal cylinder, provided with suitable means for the conveyance of the material through it, and its proper agita# tion during thc operation. It is surrounded by a heating-chamber. or jacket, which is heated by a furnace, or its equivalent; has the material to be treated supplied to it at one end, arid discharges it at the other; and has connected to it, at its supply end, a suctionpipe, drawing air through it in opposite direction to the motion of the material being treated, to carry off the moisture, as separated' by the heat, and keep the cylinder supplied with fresh, dry air.

Our invention consists in the provision of said means for carrying oil' moisture,"` and in the combination and arrangement of the parts referred to.

It is applicable for the drying of dye-woods, after curing, andk for the expelling of the water of crystalsy lization from various chemical salts, such as alum, and others. v

Description of Drawings.

In the accompanyingdrawings, made a part of this specificationl Figure 1 represents avert-ical longitudinal section of an illustrative form ot` our improved apparatus;

Figure 2, an end elevation of thesame;

Figure 3, a transverse section of `the same; and

Figure 4, a vertical longitudinal section, partly in elevation, of a'dilferent form of the apparatus.

t Similar marks of reference indicate like parts in the several figures.

A represents the drying or separating-cylinder;

B, the heating-chamber, or jacket;

C, the furnace for heating the chamber B;

`D, the pipe for carrying off the products of combustion E: the pipe or conduit for the supply of the material to the drying-cylinder; and i F, the suction or blast-pipe.

The anows 1 l (fig. 4) represent the` movement of l the material during the operation, and 2 2, the blast.

' l General Description. The separating-cylinder A is, preferably, as shown in the drawings, mounted in suitable bearings, G G, the surface ofwhich may be composed of frictionequivalent, for the application of power thereto, to rotate it. It is, in this case, provided internally with one or more spiral ilanges, a, to propel' the material through it, and with longitudinal strips or anges a', to stir or agitate the material in its passage, to secure its uniform treatment; and, externally, with a circumferential groove, a, for the recept-ion of one or each set of its supporting-rollers, g, (or any equivalent device,) to retain it longitudinally.

The suction-pipe F is further, in this case, attached, axially, to the separating-cylinder, a suitable swiveljoint being employed, and the supply-pipe E. enters it through the suction-pipe, as represente( Instead of this construction, the separating-cylinder may be stationary, the material being conveyed and agitated by any usual or suitable means, and the attachment of the supply and suction-pipes varied in that case, if preferred. It may be built of boiler-iron, or other suitable material, in usual manuel'.

The heating-chamber B may consist of a steamjacket. It, preferably, however, constitutes the iirespace of a suitable furnace, as shown. Its construction, in either case, is variable. As constituting the irespace of a furnace, its grate or furnace proper, C, may

its flue, D, lead directly out of it, as represented in figs. l and 3, or be connected to it bybranch-pipes D' D',

ers, dhd, iig. 4, may be employed to regulate its action. rlhe supply-pipe E may terminate in a funnel or thereto. Its relative ucapacity may be varied.

The suction-pipe F may lead to the centre of a romay lead to some convenient locality. y

The feed may be regulated by a spiral conveyer, such as are usual in mills, receiving its supply from a large bin, or other receptacle, and so operated by belts and gearing as to revolve as fast as desired, and so deliver just as much as the cylinder will manage.

l The size and capacity ofthe apparat-us are of course variable It may be employed for treating any materialfor Which it is adapted.

from, and motin, meanwhile, imparted to said cylinder, or to the conveying and agitating-devlces a a',

rollers, y g, and provided with a gear-wheel, H, or itsv be built externally thereof, as represented in figs. l and 3, or arranged therein, as represented in g. 4, and

'as represented in lig. 4. In either case, suitable damp-` hopper, e, tig. 4, through which to supply the material tary fan,.I, g. 4, from which an air-discharge-pipe, I',

The requisite heat being raised in the heating-chamthen to the fan I by which theblast is produced, the material to be 'treated is fed, through the pipe E, to the interior of the separating-cylinder, and agitated and conveyed therein, receiving the heat ofthe cylinder,` and having its m isture, as separated, carried off by the blast of air passi g over and through it, through the suction-pipe F, and at the saine time supplied with fresh, dry air to. assist in the operation. The speed of the conveying-device and the draught of the furnace having been proper] y regulated, the material is finally discharged at the' rear end of tbe separating-cylinder, perfectly' freed from water. By suitably extending the separating cylinder outside of its heating-chamber, the material may be cooledfmore or less, vbefore being discharged.

The blast drawing in opposite direction to the motion of the material,.the separated moisture is brought in contact with that onlfvwhich is less nearly freed from moisture, and thus its removal rendered certain, and its complete separation effected.

Claims.

We claim, as our inventionl 1. The combination, with a drying or separatingv Acylinder, A, of a suctionpipe, F, attached at or near 

